Background/Context: State-funded prekindergarten has expanded rapidly in the U.S., and there are expectations that it will have longer-term positive effects on later academic and nonacademic outcomes (e.g., Phillips et al., 2017). There is strong evidence of pre-k effects on measures of kindergarten readiness (e.g., Gormley et al., 2005; Weiland…

While the majority of published research on conceptual change has focused on how misconceptions can be abandoned or modified, some recent research findings support the hypothesis that acquired scientific knowledge does not necessarily erase or alter initial non-scientific knowledge but rather coexists with it. In keeping with this…

We evaluated the effect of morphological awareness training delivered in preschool (8 months before school entry) on reading ability at the end of grade 1 and 5 years later (in Grade 6). In preschool, one group of children received morphological awareness training, while a second group received phonological awareness training. A control group…

Reports seven studies of the acquisition of knowledge about the appearance-reality distinction and suggests some conclusions about the course of conceptual development in this area from early childhood (3 years) to adulthood. (Author/NH)

Over 1000 out of 4000 preschoolers observed conserved identity of matter over time and roughly two-thirds of the 1000 also conserved equivalence. Follow-up showed no correlation between kindergarten conservation abilities and grade one math performance but significant correlations between equivalence conservation by end of kindergarten and grade…

Similarity of friends and the degree to which friendship selection criteria and similarity change as a function of age were investigated in this study. Subjects were 27 preschoolers, 34 third graders, and 30 sixth graders. Fifty-three percent were male, 47 percent were female, and 29 percent were black. Friendship choices were measured by…

Longitudinally examines the stability of the association between maternal behavior and preschool children's cognitive abilities. Outcome measures included both school readiness (assessed at ages five and six) and achievement on mathematics and vocabulary subtests of the Iowa Tests of Basic Skills at grade six. (Author/RH)